beside the obvious ones that were huge in the 80's (i.e. back to the future, american graffiti) I really liked repo man. although not really 50's related, but the overall mood and soundtrack was heavily inspired by it. highly recommend it.

http://www.youtube.com/watch?v=c-UxKjxw9yI&feature=related

here are a few more other ones worth mentioning in the 80's/50's revival: